DE1273970B - Method for producing collapsible containers - Google Patents

Description

Method of making collapsible containers The invention relates to a method for the production of collapsible containers from one provided with edge strips Blank with folding in of pairs of folding triangles arranged between the side wall parts and at least one-sided closing of the container by means of the side wall parts arranged approaches, such that the sealing strips from superimposed edge strip parts are formed.

The known collapsible containers of this type are poorly suited to being folded around around the objects to be packaged, which is desirable in a number of cases. In the case of the known collapsible containers, the lower container part must first be formed and then be filled. However, if you want to fill from above, only an introduction of the product from the front is possible, since on both sides the Edge strip parts protrude over the actual edge of the lower part of the container.

A collapsible container that is also convenient to hold an item to be packaged or a stack of such items can be folded around or in the after appropriate design of the container base, the goods from above or from the side can be supplied, can be produced according to the invention in that the pairs of folding triangles with their edge strip parts parallel to the fold lines of the Approaches are folded outwards and that when closing the container, the edge strip parts the approaches as well as the edge strip parts of the side wall parts and the folding triangle pairs folded on top of each other and connected to each other and that the here superimposed edge strip parts together with the folding triangle pairs on the Side walls are unfolded.

Because the mentioned folding triangles and edge strip parts with each other are connected, channels that lead into the interior of the container are avoided, and a water vapor and aroma-tight closure is achieved in which all Cross the closure zones of the closure strip formed, which is a prerequisite for is a water vapor tight closure.

This folding in of the edge strip folding triangle pairs can be advantageous done in that first the edge strip parts of the opposite one another Sidewall parts are bent in such a way that the folding edges of the folding triangle pairs the edge strip to the folding edges between the folding triangles and the associated Edge strip parts come to rest. When folding in the sidebar parts or the Folding triangle pairs then place the folding triangle pairs of the edge strips automatically under the skirting parts attached to the side wall parts.

Advantageously, you can then proceed so that the outward bent folding triangles and those folded under the approaches on these folding triangles Pairs of folding triangles between the edge strips and, if necessary, the edge strips of the closure part can be welded in a single welding process. To this Way, the collapsible container according to the invention is extremely water vapor and aroma-proof weldable, taking into account that in contrast to the known collapsible containers for the most part only two cut layers are to be welded together and only at the corners there are four cut-to-size layers, as there are the pairs of folding triangles underneath the edge strip these are folded. The fact that there are four cut layers to be welded at the corners are, but offers a certain advantage, because they are the most vulnerable Make more cutting material available, so that an additional backup against leaks caused by channel formation and the like.

According to the invention you can also proceed so that the after outside folded folding triangles bent at right angles to the folding edge connecting them and thereby laying on the corresponding side wall parts, widespread edge strip approaches of the closure part, if necessary after folding in protruding parts of these approaches, be attached to the side walls. You can practically do this from a right-angled Cut to size without incisions or the like and achieved without additional cut material a collapsible container in which no unfolded cut-to-size parts are visible from the outside are. Such a container is still on two side walls through the unfolded Cutting material largely reinforced. He can therefore come from one thin Cutting material can be produced and according to the invention in a simple manner are also reinforced on the other container walls by the fact that on the base, the other two side walls and the closure part have a reinforcement insert the blank is glued on.

The actual closure parts can be designed so that on an additional approach is attached to a side wall part with the approaches is connected to the outwardly bent folding triangles and to the edge strip a closure part that extends over the container opening to form a longitudinal closure strip is connected. But you can also overlap the closure part of one side wall use with a shoulder on the other side wall.

The procedure after registration is shown in the drawings illustrated two embodiments.

Fig. 1 shows a blank according to a first embodiment of the method according to the invention.

F i g. 2 to 10 show the folding of the blank of FIG. 1.

F i g. 11 shows the finished product from the blank of FIG. 1 manufactured Container.

F i g. 12 shows a blank according to a second embodiment of the method according to the invention.

F i g. 13 to 20 show the folding of the blank of FIG. 11.

F i g. 21 shows the finished product from the blank in FIG. 12 manufactured Container.

The in F i g. 1 blank has a base 1, which is connected to side wall parts 2 to 5. The side wall parts are with each other Connected by folding triangles 6 to 13. On the side wall parts 4 and 5 are cover approaches 14, 15 provided. The side wall parts 2 and 3 have approaches in the form of edge strip parts 16, 17 on. Corresponding approaches are associated with the folding triangles 6 to 13. These edge strip parts are denoted by 18 to 25. The cover parts 14,15 have Edge strip parts 26 to 29.

The edge strip parts with the side wall parts 2 and 3 or the Folding triangles 6 to 13 are connected to each other via folding triangle pairs 30 to 37 in connection. The edge strip parts 18 to 25 are all formed by pairs of triangles 38 to 45 connected. An edge strip part 47 is attached to the cover attachment 15, that with the upper part of the cover part 14, which also forms an edge strip able to form a sealing strip. On the edge strip parts 26, 27 and 28, 29 triangles 48 to 51 are provided, which are later used to fold in the corresponding Closure strips are required.

The folding of the container can be done in such a way that initially by erecting the side wall parts 4, 5 and folding in the cover parts 14, 15 as well as gluing or welding the edge strip 47 to the upper edge of the cover part 14 to a closure strip, which is placed on the closure part 15, a hose is formed. The side wall parts 2, 3 can then be folded in.

However, it is easier to proceed as follows: First, the Sidewall parts 2 to 5 erected and the pairs of folding triangles 6 to 13 after Outside bent so that they protrude from the side wall parts 2 and 3 at a right angle (Figs. 2 to 4). This can be done in a simple manner in that, for example, in a Folding channel that erects the side wall parts 4, 5, the side wall parts 2, 3 through Folding blocks are folded, which are attached to circulating chains.

After the side wall parts have been erected, the pairs of triangles can be placed under Under certain circumstances, also welded with the aid of the aforementioned folding blocks which, as will be shown later, is not absolutely necessary. Afterward the edge strip parts 16, 17 of the side wall parts 2 and 3 to the outside, when in use of folding blocks unfolded onto them (Fig. 4).

Before or after the edge strip parts 16, 17 are bent, the filling can take place. After filling, the edge strip part 47 can then with the upper edge of the Lid are welded, and it can be the sealing strip formed thereby the cover part 15 are bent open and welded or glued to this. The welding of this longitudinal locking strip can be done by means of heating jaws with something erect Closure strip or possibly simultaneously with the one described below The side sealing strips are welded together.

The lateral closure parts can, as shown in FIG. 7 can be seen, be closed in a simple manner by welding jaws, which the edges of the edge strip parts 18 to 25 and the subsequent pairs of folding triangles 39 to 45 connect with one another. The corresponding closure zones are shown in FIG. 1 denoted by a and b.

A third closure zone c connects the perpendicular to the closure parts 14, 15 running edges of the triangles 48 to 51 with one another as well as the edge strips 26, 27 with the edge strips 28, 29 and 16, 17 and, if necessary, with the edge strips 19, 24. At the same time, the edge strips 28, 29 with the edge strips 20, 23 and a part of the edge strips 16, 17 connected. Furthermore, the folding triangle pairs 30 to 37 connected to each other.

It comes with the tool for the production of the closure zone c on it to grasp the folding edges of the pairs of folding triangles30 to 37 securely, whichever can be done by sharp-edged tools or by tools that the folding triangles 6 to 13 attack with, so they reach slightly beyond the actual closure zone. The folding triangles 30 to 37 are advantageously in the form shown in FIG. 4 shown Welded layer, as shown in FIG. 7 can be seen. But you can do this Triangles also when folding the edge strip parts 19, 20, 23, 24 under the edge strip parts 16, 17 fold, in which case the one shown in FIG. 7 shown welding tool so far must be designed differently than then the closure zone up to the side walls 3 and 5 must come close.

The closure zones a to c can also, as shown in FIG. 7 can be seen, can be produced by means of a single tool, the crossbar of which is the width of the container corresponds exactly to or exceeds it somewhat.

After welding, the folding triangles 6 to 13 are placed on the side walls 2, 3 unfolded, the remaining sealing strips to facilitate this Folding can be bent slightly upwards (Fig. 8). With this folding will then also the pairs of folding triangles that have been welded in the meantime 30 to 37 bent under the sealing strip parts 16, 17. The folded Closing strips can then also be attached to the side wall parts 2, 3 (Fig. 9, 11) or bent onto the cover surface.

But you can also use the edge strips26, 27 without additional consumption Make the cut material so wide that after you have unfolded the side Sealing strips on the side wall parts 2, 3 cover them. A corresponding Rectangular blank is shown in FIG. 12th

The container, which is open on one side, is folded in in the same way Way as for the cutting of the fig. 1 described. Like F i g. 18 shows can also the welding according to FIG. 7 can be carried out.

The folding triangles 6 to 13 are, however, again before being unfolded folded in perpendicular to their common folding edge, as shown in FIG. 19 and 20 can be seen. With this buckling of the folding triangle pairs, the edge strip parts are 26, 27 bent up onto the side walls 2 and 3. The edges 52, 53 this edge strip parts 26, 27 fold in beforehand, so that the last-mentioned edge strip parts cover the side walls 2 and 3 exactly. The folded parts 52 and 53 can you then glue it to the side walls 2 and 3. They also form an additional Reinforcement of the side walls.

In this way, in a very simple way, a water vapor and Flavor-tight packaging containers are produced that do not protrude or having folded parts folded out on the outside. The container can be made from a very thin one Cutting material can be made when using a tubular reinforcement attaches that in the blank of FIG. 12 is provided with the reference number 54. Such a simple reinforcement is sufficient in the present case because how already mentioned above, the side walls 2 and 3 by the unfolded cut parts are already largely reinforced.

The reinforcement 54 can for example consist of corrugated cardboard or the like. This reinforcement, which is glued to the blank, is shared with it folded in.

As can be seen from Fig. 12, the edges of the reinforcement do not hit together at the edges of the container. In this way, a tear-open flap can be opened in a simple manner are formed, as they are also in the blank of FIG. 1 through a perforation 55 can be provided. A corresponding perforation can be in the blank of the F i g. 12 and at the same time be provided in the reinforcement material.

But you can also use a thin blank material dispense with such a perforation and only reinforce at 56, 57 incise. The cut material can then according to the cut edges of the Reinforcement scored and formed along with that in the reinforcement in this way Flap can be lifted off.

If a kink 59 is also provided in this flap, so after first opening the flap under the other end of the tubular Reinforcement be plugged in, though the corresponding edge of the Reinforcement something overlaps.

Claims (5)

Claims: 1. Method for producing collapsible containers from a blank provided with edge strips with folding in between the side wall parts arranged pairs of folding triangles and at least one-sided closing of the container by means of lugs arranged on the side wall parts in such a way that the sealing strips are formed from superimposed edge strip parts, sets in such a way that the Closing strips made of pairs of triangles (6 to 13) with their edge strip parts (18 up to 25; 38 to 44) folded outward parallel to the fold lines of the lugs (14, 15) and that when the container is closed, the edge strip parts (26 to 29) the approaches and the edge strip parts (16, 17) of the side wall parts (2, 3) and the Folding triangle pairs (30 to 37) are folded onto one another and connected to one another and that this superimposed edge strip parts together with the Folding triangle pairs (6 to 13) are unfolded onto the side walls. 2. A method for producing collapsible containers according to claim 1, characterized characterized in that initially the edge strip parts (16, 17) of the side wall parts (2, 3) are bent in such a way that the folding edges of the pairs of folding triangles (30 to 37) the edge strip to the folding edges between the folding triangles (7, 8, 11, 12) and the associated edge strip parts (19, 20, 23, 24) come to rest. 3. A method for producing collapsible containers according to the claims 1 and 2, characterized in that the folding triangles (6 to 13) and those folded under the approaches (18 to 25) at these folding triangles Pairs of folding triangles (30 to 37) between the edge strips (16, 19, 20 and 17, 23, 24) and optionally the edge strips (16, 17) on the side wall parts (2, 3) with the edge strips (26, 27) of the closure part (14) in a single welding process be welded. 4. The method according to claims 1 to 3, characterized in that that the outwardly folded folding triangles (6 to 13) at right angles to the one connecting them Folding edge bent and laying on the corresponding side wall parts, widespread edge strips approaches (26, 27) of the closure part (14), if necessary after folding in protruding parts (52, 53) of these approaches, on the side walls (2 and 3) are attached. 5. Process according to claims 1 to 4, characterized in that that on the base (1), the non-reinforced side wall parts (4 and 5) and a reinforcing insert (54) is glued onto the blank of the closure part (14) will. Documents considered: Belgian patent specification no. 521 344. Older patents considered: German Patent No. 1179449.